555500005551 has 12 divisors (see below), whose sum is σ = 803005661640. Its totient is φ = 370048676400.

The previous prime is 555500005523. The next prime is 555500005579. The reversal of 555500005551 is 155500005555.

It is a happy number.

555500005551 is a `hidden beast` number, since 5 + 5 + 550 + 0 + 0 + 0 + 55 + 51 = 666.

It is an interprime number because it is at equal distance from previous prime (555500005523) and next prime (555500005579).

It is not a de Polignac number, because 555500005551 - 2¹⁹ = 555499481263 is a prime.

It is a super-2 number, since 2×555500005551² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555500005591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23709361 + ... + 23732778.

It is an arithmetic number, because the mean of its divisors is an integer number (66917138470).

Almost surely, 2^555500005551 is an apocalyptic number.

555500005551 is a deficient number, since it is larger than the sum of its proper divisors (247505656089).

555500005551 is a wasteful number, since it uses less digits than its factorization.

555500005551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47443446 (or 47443443 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 36.

The spelling of 555500005551 in words is "five hundred fifty-five billion, five hundred million, five thousand, five hundred fifty-one".